package com.mmall.util;

import java.math.BigDecimal;

/**
 * Created by zyc on 6/27/17.
 */
public class BigDecimalUtil {
    private BigDecimalUtil(){

    }

    public static BigDecimal add(double v1 ,double v2){
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.add(b2);
    }

    public static BigDecimal sub(double v1 ,double v2){
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.subtract(b2);
    }
    public static BigDecimal mul(double v1 ,double v2){
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.multiply(b2);
    }
    public static BigDecimal div(double v1 ,double v2){
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.divide(b2 ,2 ,BigDecimal.ROUND_HALF_UP);//四舍五入， 保留2位小数
        //除不尽的情况 使用 divide 的重载方法
    }

}
